Using coupons to encourage healthier child snack purchases in corner stores: results from the CHOMPS study.

Objectives: To examine youths' (ages 6-15 years) autonomous snack purchases in corner stores and pilot use of coupons to encourage more healthful snack purchases.

Methods: This pilot study involved four corner stores proximal to K-8 schools in Massachusetts. Kids-only coupons of varying discounts were provided in store and paired with simple visual and verbal economic and health messages.